United States. National Capital Park and Planning Commission. (1950). Regional aspects of the comprehensive plan: A portion of the comprehensive plan for the national capital and its environs. The Commission.
芝加哥风格引文United States. National Capital Park and Planning Commission. Regional Aspects of the Comprehensive Plan: A Portion of the Comprehensive Plan for the National Capital and Its Environs. Washington: The Commission, 1950.
MLA引文United States. National Capital Park and Planning Commission. Regional Aspects of the Comprehensive Plan: A Portion of the Comprehensive Plan for the National Capital and Its Environs. The Commission, 1950.
警告：这些引文格式不一定是100％准确.